Pollen quality limits seed set in Burchardia umbellata (Colchicaceae)

Seed set variation in wild Clarkia populations: teasing apart the effects of seasonal resource depletion, pollen quality, and pollen quantity

In habitats where resource availability declines during the growing season, selection may favor early-flowering individuals. Under such ephemerally favorable conditions, late-blooming species (and individuals) may be particularly vulnerable to resource limitation of seed production. In California, a region prone to seasonal drought, members of the annual genus Clarkia are among the last to flow...

Pollen density on the stigma affects endogenous gibberellin metabolism, seed and fruit set, and fruit quality in Pyrus pyrifolia

To clarify the relationship between pollen density and gametophytic competition in Pyrus pyrifolia, gametophytic performance, gibberellin metabolism, fruit set, and fruit quality were investigated by modifying P. pyrifolia pollen grain number and density with Lycopodium spores. Higher levels of pollen density improved seed viability, fruit set, and fruit quality. Treatments with the highest pol...

Toxicological assessment of abeere seed ( Huntaria umbellata K . Schum )

Thirty age-matched healthy adult male New Zealand white rabbits (2.0 ± 0.5kg BW) were randomly divided into six groups (four treatment and two control groups). The treatment groups were given intraperitoneal injection of either 0.5ml or 1.0ml liquid extract of abeere seed or the alcoholic extract (w/v) and examined for 14 days. The effect of the seed extracts on the haematological parameters, s...

The Effect of Population Size on Stigma Pollen Load, Fruit Set, and Seed Set in Allium Stellatum Ker. (Liliaceae)

Pollen and seed dispersal among dispersed plants.

The ecological significance of spacing among plants in contributing to the maintenance of species richness, particularly in tropical forests, has received considerable attention that has largely focussed on distance- and density-dependent seed and seedling mortality. More recently it has become apparent that plant spacing is also relevant to pollination, which often constrains seed production. ...